Hydraulic valve foe



Mar. 13, 1923. l

w. E. -KAY aYnBAuL1c-vm/E Fon WATER imATERs Original Filed Aug. 9, 1919" Patented Mar. 13, 1923.

UNITED STATES PATENT OFFICE.

WILLIAM E. KAY, OF ELYRIA, OHIO.

HYDRAULIC VALVE FOR 'WATER HEATERS.

Application led August 9, 1919, Serial No. 316,438. Renewed March 14, 1922.

To all fr0/1,0m 'it may concern:

Be it known that I, WILLIAM E. KAY, a citizen of the United States, and resident of Elyria, in the county of Lorain and State oi Ohio, have invented certain new and useful Improvements in Hydraulic Valves for vWater Heaters, oil which l hereby declare the following to be a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention has 'for its ob 'ect to provide increased practicability and e iciency, in action in the controlling valve by means of Which Water and gas are supplied to an instantaneous Water heater. or analogous device, and particularly an improvement upon the device described in the Letters Patent No. 863,402, granted to Eugene E. Kehnert of Lorain, Ohio, on the 13th day of August, 1907 and assigned to me.

The improvement is also designed to overcome danger of weakening and breaking of the valve operating parts, to provide a positively acting weight for closing the gas admission valve, and also to provide means for cutting off the gas supply promptly, to prevent useless consumption of gas. In the aforesaid prior patent, the hydraulic piston is connected with the gas admission valve by means of an oscillating member, and made heavier than the gas admission valve with the intention of closing the' gas admission valve by gravity of the piston, but owing to the change of gravity under water pressure on the sides of the vertical hydraulic piston, the action of the hydraulic piston cannot be depended upon to close the gas admission valve.

Also the bypass through which the Water supply passes around the piston is closed by the piston when at the lower point of its stroke and the Water pressure cannot be released to close the valve except as the Water leaks slowly past the piston in the cylinder, thus requiring the use of an undersized piston, and involving imperfect action and ali ing of the parts.

lgnnthe improved structure, the parts are inverted and a positively acting Weight is attached to the gas admission valve itself, v'vhich promptly closes the same, and by means of an additional opening in an elongated bypass, Water pressure is received below the piston so as to balance the pressure on both sides of the hydraulic piston and en- Serial N0. 543,743.

able the Weighted gas admission valve to close, also to adjust the relative movements of the hydraulic piston, and gas admission valve to varying water pressures, the hydraulic piston is supplied with an adjustable connection With its stem or rod, and supplied With a lock nut vto prevent accidental movcment. Improved connections between the oscillating member and the piston rod and valve stem are also made which provide durability, and insure perfect bearing connections and perfect alignment of parts.

Various openings are also made in the casing, and closures provided therefor, which give accessibility to all the moving parts.

The invention is illustrated in the accompanying drawings` hereinafter more fully described and specifically pointed out in the claim.

In the accompanying drawings Fig. l is a vertical longitudinal section of the device; F i 2 is a section on center line of the gas va ve and passage at right angles to Figure 1, F ig. 3 is a vertical section taken along an axial line through the hydraulic valve and cylinder also at right angles to Figure i.

In these views A is the casing of the improved valve. B is the hydraulic cylinder having the inlet and outlet openings B and C respectively. D is the bypass leading around the hydraulic piston E whose lower outlet opens intothe hydraulic cylinder be- 10W piston E and Whose upper intake is covered by said piston in the upper closed position of the latter, and F is a continuation of the bypass extending beyond its intake end, permitting the Water to How around the piston in small volume and thus forming a pressure bleed opening, to equalize the pressure thereon and permit the gas valve to close quickly. G is the gas cylinder or passage controlled by the valve H, which is operatively connected with the hydraulic piston E, by means or' the oscillating member I, and which has its lower portion in the form of cross Webs below the gas admission valve seat J. K is a Weight mounted upon the valve and designed to positively close this valve when the water pressure is cut oli' from the hydraulic piston. L and M are gas inlet and outlet openings in the gas cylinder Walls.

The oscillating member is provided with slotted extremities I', K', and the piston and valve stem are forked at E and H' respectively. Horizontal pins E2 and H2 are secured Ain said respective forks and through the respective slots. thus giving greater flexibility of movement and pernlitting of quick repair ot the parts i'll they become broken; caps N. N permit of access to these parts. Also the upper edges o'i the slotted extremities of the oscillating meniber are raised and rounded at l2. I3 and bear directly upon the forks ll and H. so that there is no liabilittvY of the pins E2 and H2 becoming bro-ken.

This construction gives great flexibility and durability to these connections. Thia piston rod is also adjustably secured in the piston at E3 und a elan'iping nut E* preA vents it from slipping.

This adjustability is quite essential to successful operation ot' the`device. This device is far superior to the previous device hereinbetore mentioned. since it is positive in action and hence more eliieient.` and adjustable to variations in water pressure, which is not true of the prior device.

It is quite obvious from the foregoing that the gas valve is controlled by the water piston to the extent that it is opened against the pressure ot' its closing weight when the piston is forced downwardly upon the opening ot' the Water passage. lVhen such opening takes place in the water pasi sage pressure on the lower side of the piston. is reduced and pressure upon its upper side thereupon forces the piston downwarillv. the eonneetions between the piston rod and the gas valve operating to open the latter. \Vhen the water passage is Closed pressure accumulates very quickly below the water piston and as the latter nieves upwardly. the extension ot the by-pass with its bleed opening operate to permit quick equalizac tion of pressure above and below the piston so that the gas valve can be quickly seated by the weight thereon.

In its use. the valve is adapted for counection like the previous device, and as shown partieularly in Fig. 4, wherein the easing A is shown with its fluid intake ll connected to a water supply pipe U and with its fluid outlet C Connected by a` pipe l" to a` Water heating coil lt. in turn deA livering to a faucet S. A gas supply pipe T leads to the gas intake L and a gas outlet` pipe ll leads from the gas outlet M to a burner V beneath the eoil H. the device as a Whole functioning to cut off the gas supply to burner V when the flow ot Huid through the casing A stops.

Having described the invention what I elaiin as new and desire to secure by Letters Patent iszln a water controlled gas admission de vice, al single easing including hydraulie and gas cylinders having respectively a. piston and a gas control valve and having in takes and outlets, connections between said piston and said valve for opening the latter when the former is inoved to open position. a weight connected with the gas valve Yfor closing the saine when the piston moves to eiosed position. said gas cylinder having an extension above its valve in which the said weight is movable. and seid l'iydraulie c vlin der having a by-pass provided with an intake opening at one end and with an outlet opening at its opposite enti. the tormel' oi" which is eovered by the piston in the closed position ot' the latter.y said bypass having an extension beyond its intake opening provided vvith a pressure bleed opening in Cornniunieation with the cylinder at a point between the closed position or1 the pistou and the cylinder intake.

In testimony whereotfl hereunto set my hand this 28th day of July. 1919.

VVILLTAM E. KAY.

In presence of- HAnnY N. REniNo'roN, JANE HARPER.

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